For matrices AAA and BBB (of compatible dimensions), what is the correct form of (AB)T(AB)^T(AB)T?
(AB)T=ATBT(AB)^T = A^T B^T(AB)T=ATBT
(AB)T=BTAT(AB)^T = B^T A^T(AB)T=BTAT
(AB)T=AB(AB)^T = AB(AB)T=AB
(AB)T=BA(AB)^T = BA(AB)T=BA